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FX2NC Series Programmable Controllers
Diagnostics 7.
7-4
7.3
Common errors
-
Corroded contact points at some point in an I/O line.
-
An I/O device has been used outside its specified operating range.
-
An input signal occurs in a shorter time period that taken by one program scan.
7.4
Replacing the battery
Turn OFF PC's power supply. Remove sidecover
from the PC. Remove battery from holder-discon-
nect and replace (this should be carried out in 20
sec if the current data held in the PC’s RAM is not
to be lost).
Refit battery and cover.
Caution:
-
Battery replacement requires users to verify
data integrity such as the PLC program
(when a memory board is not attached),
latched (battery backed) device values and
RTC values.
Before switching the PLC to RUN, ensure the safety of the operation.
-
If the battery backed data becomes unstable, clear the latched (battery backed) devices,
and transfer the data again. Set the RTC and default values again if necessary.
Figure 7.1: Battery (FX
2NC
-32BL)
Summary of Contents for MELSEC FX2NC-16MT-D/UL
Page 1: ...D UL HARDWARE MANUAL FX2NC D UL SERIES PROGRAMMABLE CONTROLLERS ...
Page 12: ...FX2NC Series Programmable Controllers Introduction 1 ...
Page 40: ...FX2NC Series Programmable Controllers Introduction 1 1 28 MEMO ...
Page 42: ...FX2NC Series Programmable Controllers Terminal layouts 2 ...
Page 48: ...FX2NC Series Programmable Controllers Installation notes 3 ...
Page 70: ...FX2NC Series Programmable Controllers Power supply 4 ...
Page 78: ...FX2NC Series Programmable Controllers Inputs 5 ...
Page 88: ...FX2NC Series Programmable Controllers Inputs 5 5 10 MEMO ...
Page 90: ...FX2NC Series Programmable Controllers Outputs 6 ...
Page 108: ...FX2NC Series Programmable Controllers Outputs 6 6 18 MEMO ...
Page 110: ...FX2NC Series Programmable Controllers Diagnostics 7 ...
Page 126: ...FX2NC Series Programmable Controllers Diagnostics 7 7 16 MEMO ...
Page 128: ...FX2NC Series Programmable Controllers Diagnostics 8 ...
Page 130: ...FX2NC Series Programmable Controllers Discontinued model 8 8 2 MEMO ...
Page 131: ......